lap = 3
print("第%d名" % lap)

print("%d" % 3.14)
print("%d" % 3.99)

print("圆周率: %f" % 3.1415926)
print("小数：%.2f" % 99.99)

print("%s" % 100)
print("%s" % 3.14)

report = "%d年%s公司营收增长了%.2f%% " % (2019, "腾讯", 20.28)
print(report)

print('{:,}'.format(1234567890))
print("{0}年{1}公司营收增长了{2}% ".format(2019, "腾讯", 20.28))
